Salt stress mitigation by seed priming with UV-C in lettuce plants: Growth, antioxidant activity and phenolic compounds
| Autor: | Laurent Urban, Jawad Aarrouf, Mohamed Chebbi, Chayma Ouhibi, Mokhtar Lachaal, Fedia Rebah, Najoua Msilini, Houneida Attia |
|---|---|
| Přispěvatelé: | EA 4279 Laboratoire Physiologie des Fruits et Légumes, Avignon Université (AU), Université de Tunis El Manar (UTM), Unite Physiol & Biochim Tolerance Sel Chez Plante, Ecologie, Evolution, Symbiose (EES), Ecologie et biologie des interactions (EBI), Université de Poitiers-Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers-Centre National de la Recherche Scientifique (CNRS), Dept Biol, Faculté des Sciences Mathématiques, Physiques et Naturelles de Tunis (FST), Université de Tunis El Manar (UTM)-Université de Tunis El Manar (UTM) |
| Rok vydání: | 2014 |
| Předmět: |
0106 biological sciences
Antioxidant Ultraviolet Rays Physiology DPPH [SDV]Life Sciences [q-bio] medicine.medical_treatment Flavonoid Lactuca Plant Science Priming (agriculture) Sodium Chloride Biology 01 natural sciences Antioxidants 03 medical and health sciences chemistry.chemical_compound Phenols Stress Physiological Botany Tissue hydration Genetics medicine [SDV.BV]Life Sciences [q-bio]/Vegetal Biology 030304 developmental biology chemistry.chemical_classification 0303 health sciences fungi food and beverages Lettuce biology.organism_classification Salinity Horticulture chemistry Elongation 010606 plant biology & botany |
| Zdroj: | Plant Physiology and Biochemistry Plant Physiology and Biochemistry, Elsevier, 2014, ⟨10.1016/j.plaphy.2014.07.019⟩ |
| ISSN: | 0981-9428 |
| DOI: | 10.1016/j.plaphy.2014.07.019 |
| Popis: | International audience; Seeds of Lactuca sativa L. 'Romaine' were subjected to priming treatments with UV-C radiation at 0.85 or 3.42 kJ m À2. Seedlings obtained from both primed (Pr) and non-primed (NPr) seeds were grown in an hydroponic culture system supplemented with 0 (control) or 100 mM NaCl. After 21 days of NaCl treatment, root and leaf biomass, root lengths, leaf numbers, and leaf surface area were measured. Ions (Na þ and K þ) accumulation was determined in roots and leaves. Total phenolic compound and flavonoid concentrations, as well as antioxidant and antiradical activities were measured in L. sativa leaves. Salt stress resulted in a lower increase in fresh weight of roots and leaves, which was more pronounced in roots than in leaves, due to reduced root elongation, leaf number and leaf expansion, as well as leaf thickness. The lower increase in fresh weight was accompanied by a restriction in tissue hydration and K þ ion uptake, as well as an increase in Na þ ion concentrations in all organs. These effects were mitigated in plants from the UV-C primed seeds. The mitigating effect of UV-C was more pronounced at 0.85 than at 3.42 kJ m À2. Salt stress also resulted in an increase in total phenolic compounds and flavonoid concentrations and in the total antioxidant capacity in leaves. The highest diphenylpicrylhydrazyl radical (DPPH) scavenging activity was found in the leaves of plants from both Pr seeds. Our results suggest that plants grown from seed primed by exposure to moderate UV-C radiation exhibited a higher tolerance to salinity stress. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect